Light Guide Plate With Scattering Microstructures for Sunlight Blocking
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Solution Overview
Problem
Conventional glass has high optical transmittance, making it ineffective for blocking heat and sunlight, and existing solutions like sunscreen stickers and window shades are not fully satisfactory.
Innovation Solution
An optical transmittance adjustment device comprising a light guide plate with light scattering microstructures and an optical transmittance adjustment film that scatters and absorbs or reflects light, reducing the proportion of light transmitted through the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional glass is used, then high optical transmittance is achieved, but heat and sunlight blocking performance deteriorates
Solution Approach 1:
The glass surface is segmented into light-transmitting regions and light-blocking regions through the light guiding layer pattern, allowing different areas to perform different functions. This enables the glass to simultaneously maintain high optical transmittance in transparent areas while blocking sunlight and heat in patterned areas.
Solution Approach 2:
The light guiding layer is applied locally to specific regions of the glass rather than uniformly across the entire surface. This local application creates zones with different optical properties, allowing the glass to exhibit both high transmittance and effective sunlight blocking in different locations.
2Object-affected harmful factors
If sunscreen stickers or window shades are added, then heat and sunlight blocking is improved, but device complexity and ease of operation deteriorates
Solution Approach 1:
The light guiding layer is integrated directly into the glass structure, merging the sunlight blocking function with the glass itself. This eliminates the need for separate sunscreen stickers or window shades, reducing overall device complexity while maintaining effective heat and sunlight blocking.
Solution Approach 2:
The glass structure itself provides the sunlight blocking function through the light guiding layer, making the glass self-sufficient. This eliminates the need for additional external components or accessories, simplifying the overall system.
3Object-affected harmful factors
If light scattering microstructures are added, then sunlight blocking is improved, but light transmission deteriorates
Solution Approach 1:
The light scattering microstructures are localized to specific regions within the light guiding layer, creating areas with different optical properties. This allows the glass to scatter and block sunlight in patterned regions while maintaining clear light transmission in other areas.
Solution Approach 2:
The glass surface is divided into regions with light scattering microstructures and regions without them, enabling selective sunlight blocking while preserving overall light transmission and visibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively blocks sunlight while potentially utilizing scattered light for supplementary illumination or decorative purposes, and can also enhance heat dissipation through thermal insulation.
Implementation Method 1
the light scattering microstructures are located between the optical transmittance adjustment film and the light guide plate
Implementation Method 2
by using the characteristics of the optical transmittance adjustment film that absorbs or reflects the light beam
Implementation Method 3
by using the characteristics of the optical transmittance adjustment film that absorbs or reflects the light beam
Implementation Method 4
the optical transmittance adjustment film is a photochromic film
Data Source
AI summary
An optical transmittance adjustment device including a light guide plate and an optical transmittance adjustment film is provided. The light guide plate has a first surface and a second surface, wherein the second surface is opposite to the first surface and has a plurality of light scattering microstructures. The optical transmittance adjustment film is located at a side of the light guide plate, and the light scattering microstructures are located between the optical transmittance adjustment film and the light guide plate.